I think this would depend on where the money came from. If it was from the sale of a marital asset then, yes you are entitled to 1/2 of it. If it was something that your STBX did after your separation that had nothing to do with your marriage then you are not entitled to any of it. Just as he is not entitled to any of your income after your separation date, unless it is from the sale of a marital asset.
"(1) “Marital property” means all real and personal property acquired by either spouse or both spouses during the course of the marriage and before the date of the separation of the parties, and presently owned, except property determined to be separate property or divisible property in accordance with subdivision (2) or (4) of this subsection. Marital property includes all vested and nonvested pension, retirement, and other deferred compensation rights, and vested and nonvested military pensions eligible under the federal Uniformed Services Former Spouses’ Protection Act. It is presumed that all property acquired after the date of marriage and before the date of separation is marital property except property which is separate property under subdivision (2) of this subsection. This presumption may be rebutted by the greater weight of the evidence.
(2) "Separate property" means all real and personal property acquired by a spouse before marriage or acquired by a spouse by bequest, devise, descent, or gift during the course of the marriage. However, property acquired by gift from the other spouse during the course of the marriage shall be considered separate property only if such an intention is stated in the conveyance. Property acquired in exchange for separate property shall remain separate property regardless of whether the title is in the name of the husband or wife or both and shall not be considered to be marital property unless a contrary intention is expressly stated in the conveyance. The increase in value of separate property and the income derived from separate property shall be considered separate property. All professional licenses and business licenses which would terminate on transfer shall be considered separate property. (3) "Distributive award" means payments that are payable either in a lump sum
or over a period of time in fixed amounts, but shall not include alimony payments or other similar payments for support and maintenance which are treated as ordinary income to the recipient under the Internal Revenue Code.
- “Divisible property” means all real and personal property as set forth below:
a. All appreciation and diminution in value of marital property and divisible property of the parties occurring after the date of separation and prior to the date of distribution, except that appreciation or diminution in value which is the result of postseparation actions or activities of a spouse shall not be treated as divisible property.
b. All property, property rights, or any portion thereof received after the date of separation but before the date of distribution that was acquired as a result of the efforts of either spouse during the marriage and before the date of separation, including, but not limited to, commissions, bonuses, and contractual rights.
c. Passive income from marital property received after the date of separation, including, but not limited to, interest and dividends.
d. Increases and decreases in marital debt and financing charges and interest related to marital debt."
If the equitable distribution does not come out equally, you could end up having to sell the house regardless in order to comply with paying him 1/2 the marital assets. Please keep in mind when you think about asking for more that he could be entitled to do the same to you.